SU210801A1 - AUTOMATIC MACHINE FOR BENDING PAPERS FROM TAPE - Google Patents

Description

There are known automatic machines for bending blanks from a belt, containing power cylinders mounted on a rack, for a belt feeding and cutting pieces driven from spools, as well as a die and a punch.

The proposed automaton differs from the known ones in that it is equipped with a mechanism for changing the stroke of the punch and, consequently, the depth of bending, made in the form of a lead screw mounted on the frame and having two threaded parts with different pitch.

One threaded part is connected with scissors for cutting the blanks and moves them, the other interacts with the stop entering the belt feeder.

The stop is rigidly connected with the wedge through the joint and, with its help, acts on the bevel of the cracker located between the jaws of the die and interacting with the stem of the spool installed in the pneumatic cylinder of the press.

The mechanism for changing the stroke of the punch is provided with an arrow associated with the stop and moved during the changeover of the machine along the scale.

in fig. 2 - the same, times (cut along A-A of Fig. I; ma of Fig. 3 - the same, section along B-B of Fig. 1.

The proposed machine consists of a tape feed mechanism, a workpiece cutting mechanism, a flexible unit and a mechanism for changing the stroke of a punch.

A pneumatic cylinder 2 for feeding the strip and scissors 3 for cutting the blanks are rigidly fixed on the frame. On the rod of the pneumatic cylinder 2 feed mounted pneumatic cylinder 4 capture strip.

The bending assembly contains a pneumatic cylinder 5, on the stem 6 of which a valve 7 is installed, which switches the air supply in the cavity of all pne: motors. On the rod 6, the punch 8 with the spring-loaded bag 9 is also strengthened.

Coaxially to the punch 8 on the frame 1 there is a matrix consisting of sponges 10, made in the form of two posts, fixed on the frame by the lower ends.

Between the jaws there is a spring-loaded cracker //, connected with the stem 12. On one of the jaws is mounted a bracket 13, in which a screw 14 is fixed, connected with a wedge 15.

The mechanism for changing the stroke of the punch 5 is made in the form of a lead screw 16 having two threaded parts with different pitch. The screw 16 is connected with one screw part to scissors 3, and the other with stop 17. The screw is fixed relative to the frame / bearing 18. A handle 19 is seated on the BHJHT.

For synchronized operation of the machine knotter, the working cavities of all pneumatic cylinders and idle cavities of the pneumatic cylinders of the belt and feed mechanism are connected to the spool 7.

During the operation of the machine, compressed air from the pneumatic line enters the spool 7. During the working stroke, air is supplied through the hoses into the working cavities of all pneumatic cylinders, i.e., their different volumes. The first is the pneumatic cylinder-4, which snatches a metal strip from a roll.

Then the pneumatic cylinder 2 of the feed strip is activated, the movement of the rod of which is limited by the stop 17, and after it the pneumatic cylinder 5, which cuts the workpiece through the pusher 22 and then bends it.

Putting the automatic machine aa different sizes of the manufactured part, using the handles 19 rotates the screw 16. With this, the shears 3 and the stop 17 alternate in the slot of the bed, limiting ush, the stroke of the pneumatic cylinder 2 of the feed strip. The machine adjusts to a size on a scale, the arrow of which is associated with the stop 17.

The stop 17, moving along the groove of the bed 1, through the wedge 15 acts on the bevel of the cracker 11 and thus determines the bending depth of the manufactured part.

Together with the cracker 11, the rod 12 is moved, which is an abutment that switches the valve 7. Thus, the stroke of the pneumatic cylinder 5 is adjusted.

Tuning to a different strip thickness is performed by rotating the M screw 14, acting through the wedge 15 on the jaws 10 of the matrix. The lips are elastically compressed, reducing or increasing the gap between the punch and the die.

Subject invention

Claims (2)

1. An automatic machine for bending a blank from a belt, containing devices for feeding the belt and for cutting pieces, as well as a die and a punch for bending, mounted on a frame and driven from controllable zolotnik of power cylinders, in order to readjustment of the machine for different sizes of the manufactured part, for example, a casting foal, it is equipped with a mechanism for changing the stroke of the punch and the corresponding bending depth, made in the form of a lead screw mounted on a frame with two threaded parts Gom, respectively conveying device for shears segments of billets and incoming into the device for feeding the tape stop which moves through the thrust wedge bonded with a matrix representing the two legs with a built-in between them and 0 movable wedge crackers associated with a spool rod. 2. An automatic machine according to claim 1, characterized in that the mechanism for changing the stroke of the punch is provided with an arrow connected to the stop, which is moved during the changeover of the automatic machine along the scale fixed on the frame.